Loans Receivable - Schedule of Aging of Past Due (Detail) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans receivable	$ 1,430,642	$ 1,358,935
Nonaccrual	0	0
Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Receivable	24	46
Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Receivable		25
Finance Receivables, Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Receivable	24	71
Financial Asset, Not Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Receivable	1,430,618	1,358,864
Single Family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans receivable	173,993	161,362
Single Family [Member] | Financial Asset, Not Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Receivable	173,993	161,362
Residential Real Estate Multi Family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans receivable	192,495	137,705
Residential Real Estate Multi Family [Member] | Financial Asset, Not Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Receivable	192,495	137,705
Residential Real Estate Farm Land [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans receivable	650	1,323
Residential Real Estate Farm Land [Member] | Financial Asset, Not Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Receivable	650	1,323
Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans receivable	188,024	173,086
Owner Occupied [Member] | Financial Asset, Not Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Receivable	188,024	173,086
Non Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans receivable	399,981	361,101
Non Owner Occupied [Member] | Financial Asset, Not Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Receivable	399,981	361,101
Commercial Real Estate Construction Land Development Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans receivable	344,605	337,173
Commercial Real Estate Construction Land Development Loan [Member] | Financial Asset, Not Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Receivable	344,605	337,173
Commercial & Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans receivable	111,183	164,014
Commercial & Industrial [Member] | Financial Asset, Not Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Receivable	111,183	164,014
Unsecured [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans receivable	272	185
Unsecured [Member] | Financial Asset, Not Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Receivable	272	185
Secured [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans receivable	19,439	22,986
Secured [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Receivable	24	46
Secured [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Receivable		25
Secured [Member] | Finance Receivables, Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Receivable	24	71
Secured [Member] | Financial Asset, Not Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Receivable	$ 19,415	$ 22,915